/* ==========================================================================
   Noblogs — pagine pubbliche e di accesso della piattaforma.

   Identità propria, distinta dai temi dei blog: colonna larga, intestazione
   con bordo, un solo colore d'accento. Nessuna risorsa esterna, solo font di
   sistema. Il tema scuro segue l'impostazione del sistema operativo.

   I rapporti di contrasto di testo e collegamenti rispettano WCAG AA su
   entrambi i temi, e il contorno di messa a fuoco è sempre visibile: la
   piattaforma è la parte che si usa con la tastiera.
   ========================================================================== */

:root {
  color-scheme: light dark;

  --pf-bg: #fbfbf9;
  --pf-surface: #ffffff;
  --pf-surface-alt: #f2f2ed;
  --pf-text: #1c1c1a;
  --pf-muted: #56564f;
  --pf-border: #dcdcd5;
  --pf-border-strong: #b9b9b0;
  --pf-accent: #14507d;
  --pf-accent-text: #ffffff;
  --pf-accent-hover: #0e3c5f;
  --pf-ok-bg: #e4f2e6;
  --pf-ok-text: #1c5127;
  --pf-error-bg: #fbe6e4;
  --pf-error-text: #8a1c14;
  --pf-focus: #b8500a;

  --pf-radius: 6px;
  --pf-shell: 60rem;
  --pf-font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --pf-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --pf-bg: #15151a;
    --pf-surface: #1d1d23;
    --pf-surface-alt: #23232b;
    --pf-text: #e9e9e4;
    --pf-muted: #adada6;
    --pf-border: #33333c;
    --pf-border-strong: #4b4b56;
    --pf-accent: #8ec5f0;
    --pf-accent-text: #0d1a24;
    --pf-accent-hover: #b3d9f7;
    --pf-ok-bg: #16301d;
    --pf-ok-text: #a8dfb4;
    --pf-error-bg: #3a1714;
    --pf-error-text: #f2b3ac;
    --pf-focus: #ffb066;
  }
}

/* --- base ---------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  font-family: var(--pf-font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--pf-text);
  background: var(--pf-bg);
}

h1, h2, h3, h4 {
  line-height: 1.25;
  font-weight: 650;
  text-wrap: balance;
}

h1 { font-size: 1.9rem; margin: 0 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.35rem; margin: 2.5rem 0 .75rem; }
h3 { font-size: 1.1rem; margin: 1.75rem 0 .5rem; }

p, ul, ol, dl, table, pre, blockquote {
  margin: 0 0 1rem;
}

a {
  color: var(--pf-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--pf-accent-hover);
}

/* Il contorno non viene mai rimosso: chi naviga con la tastiera deve sapere
   dove si trova. Due pixel di scostamento perché resti leggibile anche sopra
   un bordo. */
:focus-visible {
  outline: 3px solid var(--pf-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

code, kbd, samp {
  font-family: var(--pf-mono);
  font-size: .875em;
}

code {
  padding: .1em .3em;
  border-radius: 3px;
  background: var(--pf-surface-alt);
}

pre {
  padding: .875rem 1rem;
  overflow-x: auto;
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius);
  background: var(--pf-surface-alt);
  line-height: 1.5;
}

pre code {
  padding: 0;
  background: none;
  white-space: pre;
}

img {
  max-width: 100%;
  height: auto;
}

hr {
  height: 1px;
  margin: 2rem 0;
  border: 0;
  background: var(--pf-border);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: .5rem .625rem;
  text-align: left;
  border-bottom: 1px solid var(--pf-border);
  vertical-align: top;
}

th {
  font-weight: 650;
}

thead th {
  border-bottom: 2px solid var(--pf-border-strong);
}

.pf-shell {
  width: 100%;
  max-width: var(--pf-shell);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.pf-narrow {
  max-width: 30rem;
}

.pf-main {
  flex: 1 0 auto;
  padding: 2.5rem 0 3.5rem;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: .625rem 1rem;
  background: var(--pf-accent);
  color: var(--pf-accent-text);
  z-index: 10;
}

.skip-link:focus {
  left: .5rem;
  top: .5rem;
  color: var(--pf-accent-text);
}

/* Campo esca del modulo di registrazione: fuori dallo schermo, non
   display:none, così i programmi che compilano i moduli lo trovano. */
.nb-hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* --- intestazione -------------------------------------------------------- */

.pf-header {
  border-bottom: 1px solid var(--pf-border);
  background: var(--pf-surface);
}

.pf-header .pf-shell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem 1.5rem;
  padding-block: .875rem;
}

.pf-logo {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--pf-text);
  text-decoration: none;
}

.pf-logo:hover {
  color: var(--pf-accent);
}

.pf-logo-mark {
  font-size: 1.25rem;
  line-height: 1;
}

.pf-nav {
  margin-right: auto;
}

.pf-nav ul,
.pf-footer-links,
.pf-filter-group,
.pf-error-links,
.pf-entry-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1.15rem;
}

.pf-nav a,
.pf-footer-links a {
  color: var(--pf-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.pf-nav a:hover,
.pf-nav a:focus-visible,
.pf-footer-links a:hover {
  color: var(--pf-accent);
  border-bottom-color: currentColor;
}

.pf-account {
  display: flex;
  align-items: center;
  gap: .875rem;
}

.pf-logout {
  margin: 0;
}

/* --- pulsanti e collegamenti --------------------------------------------- */

.pf-button {
  display: inline-block;
  padding: .5rem 1rem;
  border: 1px solid var(--pf-accent);
  border-radius: var(--pf-radius);
  background: var(--pf-accent);
  color: var(--pf-accent-text);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.pf-button:hover {
  background: var(--pf-accent-hover);
  border-color: var(--pf-accent-hover);
  color: var(--pf-accent-text);
}

.pf-button-big {
  padding: .6875rem 1.375rem;
  font-size: 1.0625rem;
}

.pf-link {
  color: var(--pf-text);
  text-decoration: none;
  border-bottom: 1px solid var(--pf-border-strong);
}

.pf-link:hover {
  color: var(--pf-accent);
  border-bottom-color: currentColor;
}

.pf-link-button {
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  color: var(--pf-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}

.pf-link-button:hover {
  color: var(--pf-accent);
}

/* --- messaggi ------------------------------------------------------------ */

.pf-flash {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: .5rem;
}

.pf-flash li {
  padding: .625rem .875rem;
  border-radius: var(--pf-radius);
  border-inline-start: 4px solid currentColor;
}

.pf-flash-success {
  background: var(--pf-ok-bg);
  color: var(--pf-ok-text);
}

.pf-flash-error {
  background: var(--pf-error-bg);
  color: var(--pf-error-text);
}

.pf-notice {
  padding: .75rem .875rem;
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius);
  background: var(--pf-surface-alt);
  color: var(--pf-muted);
  font-size: .9375rem;
}

.pf-empty {
  padding: 2rem 0;
  color: var(--pf-muted);
  font-style: italic;
}

.pf-lead {
  font-size: 1.125rem;
  color: var(--pf-muted);
  max-width: 46rem;
}

.pf-hint {
  margin: .375rem 0 0;
  font-size: .875rem;
  color: var(--pf-muted);
}

/* --- pagina di ingresso -------------------------------------------------- */

.pf-hero {
  display: grid;
  gap: 2.5rem;
  align-items: start;
  padding-bottom: 1rem;
}

@media (min-width: 52rem) {
  .pf-hero {
    grid-template-columns: 1.15fr .85fr;
    gap: 3.5rem;
  }
}

.pf-hero h1 {
  font-size: clamp(2.1rem, 6vw, 3rem);
  margin-bottom: .75rem;
}

.pf-stats {
  margin-top: 1.5rem;
  color: var(--pf-muted);
  font-size: .9375rem;
}

.pf-stats strong {
  font-size: 1.25rem;
  color: var(--pf-text);
  font-variant-numeric: tabular-nums;
}

.pf-hero-form {
  padding: 1.5rem;
  border: 1px solid var(--pf-border);
  border-radius: calc(var(--pf-radius) * 2);
  background: var(--pf-surface);
}

.pf-hero-form h2 {
  margin: 0 0 1rem;
  font-size: 1.2rem;
}

.pf-form-note {
  margin: .75rem 0 0;
  font-size: .875rem;
  color: var(--pf-muted);
}

.pf-features {
  padding-top: 1.5rem;
}

.pf-feature-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem 2rem;
}

@media (min-width: 40rem) {
  .pf-feature-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.pf-feature-grid h3 {
  margin: 0 0 .375rem;
  display: flex;
  align-items: baseline;
  gap: .5rem;
}

.pf-feature-grid p {
  margin: 0;
  color: var(--pf-muted);
}

.pf-feature-glyph {
  font-size: 1.125rem;
}

.pf-more {
  margin-top: 1.5rem;
}

.pf-tagline {
  margin-top: 3rem;
  color: var(--pf-muted);
  font-size: .9375rem;
}

/* --- moduli -------------------------------------------------------------- */

.pf-form {
  display: grid;
  gap: 1.25rem;
  margin: 1.75rem 0;
}

.pf-field label,
.pf-hero-form label {
  display: block;
  margin-bottom: .3125rem;
  font-weight: 600;
  font-size: .9375rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="url"] {
  width: 100%;
  padding: .5625rem .6875rem;
  font: inherit;
  color: var(--pf-text);
  background: var(--pf-surface);
  border: 1px solid var(--pf-border-strong);
  border-radius: var(--pf-radius);
}

input:focus-visible {
  border-color: var(--pf-accent);
}

::placeholder {
  color: var(--pf-muted);
  opacity: .8;
}

.pf-field-inline {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.pf-field-inline input {
  flex: 1 1 auto;
  min-width: 0;
}

.pf-field-suffix {
  flex: 0 0 auto;
  color: var(--pf-muted);
  font-size: .9375rem;
  white-space: nowrap;
}

.pf-form button[type="submit"] {
  justify-self: start;
}

.pf-hero-form button[type="submit"] {
  margin-top: 1rem;
  width: 100%;
}

.pf-form-links {
  font-size: .9375rem;
  color: var(--pf-muted);
}

/* --- vetrina ------------------------------------------------------------- */

.pf-search {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: .625rem;
  margin: 1.5rem 0;
}

.pf-search label {
  flex: 1 1 100%;
  font-weight: 600;
  font-size: .9375rem;
}

.pf-search input {
  flex: 1 1 16rem;
}

.pf-search button {
  padding: .5625rem 1.125rem;
  font: inherit;
  font-weight: 600;
  color: var(--pf-accent-text);
  background: var(--pf-accent);
  border: 1px solid var(--pf-accent);
  border-radius: var(--pf-radius);
  cursor: pointer;
}

.pf-search button:hover {
  background: var(--pf-accent-hover);
  border-color: var(--pf-accent-hover);
}

.pf-filters {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 2rem;
  padding: .75rem 0;
  margin-bottom: .5rem;
  border-block: 1px solid var(--pf-border);
  font-size: .9375rem;
}

/* I gruppi di filtri stanno sulla stessa riga: un separatore rende evidente
   dove finisce l'ordinamento e comincia la lingua. */
.pf-filter-group + .pf-filter-group {
  padding-left: 2rem;
  border-left: 1px solid var(--pf-border);
}

.pf-filter-group a {
  color: var(--pf-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.pf-filter-group a:hover {
  color: var(--pf-accent);
  border-bottom-color: currentColor;
}

.pf-filter-group a[aria-current] {
  color: var(--pf-text);
  font-weight: 650;
  border-bottom-color: var(--pf-accent);
}

.pf-entries {
  list-style: none;
  margin: 0;
  padding: 0;
}

.pf-entry {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--pf-border);
}

.pf-entry-title {
  margin: 0 0 .25rem;
  font-size: 1.1875rem;
}

.pf-entry-title a {
  color: var(--pf-text);
  text-decoration: none;
}

.pf-entry-title a:hover {
  color: var(--pf-accent);
  text-decoration: underline;
}

.pf-entry-meta {
  margin: 0 0 .5rem;
  font-size: .875rem;
  color: var(--pf-muted);
}

.pf-entry-blog {
  color: var(--pf-muted);
  font-weight: 600;
}

.pf-entry-description {
  margin: 0;
  color: var(--pf-muted);
}

.pf-entry-tags {
  margin-top: .5rem;
  gap: .35rem .5rem;
  font-size: .8125rem;
}

.pf-entry-tags a {
  display: inline-block;
  padding: .0625rem .5rem;
  border: 1px solid var(--pf-border);
  border-radius: 999px;
  color: var(--pf-muted);
  text-decoration: none;
}

.pf-entry-tags a:hover {
  border-color: var(--pf-accent);
  color: var(--pf-accent);
}

.pf-pagination {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0;
  font-size: .9375rem;
}

.pf-pagination a:last-child {
  text-align: right;
}

.pf-pagination-info {
  color: var(--pf-muted);
  text-align: center;
}

.pf-discover-links,
.pf-results-count {
  font-size: .9375rem;
  color: var(--pf-muted);
}

.pf-results-heading {
  margin-top: 2rem;
}

/* --- pagine di testo ----------------------------------------------------- */

.pf-prose {
  max-width: 44rem;
}

.pf-prose h2 {
  padding-top: .5rem;
  border-top: 1px solid var(--pf-border);
}

.pf-prose li {
  margin-bottom: .375rem;
}

.pf-prose dt {
  font-weight: 650;
  margin-top: 1rem;
}

.pf-prose dd {
  margin: .25rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--pf-border);
  color: var(--pf-muted);
}

.pf-prose table {
  font-size: .9375rem;
}

.pf-toc {
  padding: 1rem 1.25rem;
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius);
  background: var(--pf-surface-alt);
  font-size: .9375rem;
}

.pf-toc ol {
  margin: 0;
  padding-left: 1.25rem;
}

.pf-toc li {
  margin-bottom: .1875rem;
}

/* --- guida al markdown --------------------------------------------------- */

/* La guida è più larga delle altre pagine di testo perché gli esempi stanno
   su due colonne; i paragrafi restano stretti per non allungare le righe. */
.pf-guide {
  max-width: 54rem;
}

.pf-guide > p,
.pf-guide .pf-toc,
.pf-md-section > p {
  max-width: 44rem;
}

.pf-md-section {
  margin-bottom: 2.5rem;
}

.pf-md-example {
  display: grid;
  gap: .75rem;
  margin: 1rem 0 1.5rem;
  padding: 1rem;
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius);
  background: var(--pf-surface);
}

@media (min-width: 46rem) {
  .pf-md-example {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
}

.pf-md-example h3 {
  margin: 0 0 .5rem;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--pf-muted);
}

.pf-md-source pre {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.pf-md-rendered > :first-child {
  margin-top: 0;
}

.pf-md-rendered > :last-child {
  margin-bottom: 0;
}

.pf-md-rendered h1 { font-size: 1.4rem; margin: 1rem 0 .5rem; }
.pf-md-rendered h2 { font-size: 1.2rem; margin: 1rem 0 .5rem; padding-top: 0; border-top: 0; }
.pf-md-rendered h3 { font-size: 1.05rem; margin: 1rem 0 .5rem;
  letter-spacing: normal; text-transform: none; color: inherit; font-weight: 650; }
.pf-md-rendered h4,
.pf-md-rendered h5,
.pf-md-rendered h6 { font-size: 1rem; margin: 1rem 0 .5rem; }

.pf-md-rendered blockquote {
  margin: 1rem 0;
  padding: .25rem 0 .25rem 1rem;
  border-left: 3px solid var(--pf-border-strong);
  color: var(--pf-muted);
}

.pf-md-rendered .callout {
  margin: 1rem 0;
  padding: .75rem 1rem;
  border: 1px solid var(--pf-border);
  border-left-width: 4px;
  border-radius: var(--pf-radius);
  background: var(--pf-surface-alt);
}

.pf-md-rendered .callout-title {
  margin: 0 0 .25rem;
  font-weight: 700;
}

.pf-md-rendered .callout > :last-child {
  margin-bottom: 0;
}

.pf-md-rendered .callout-warning,
.pf-md-rendered .callout-danger {
  border-left-color: var(--pf-error-text);
}

.pf-md-rendered .callout-note,
.pf-md-rendered .callout-info,
.pf-md-rendered .callout-tip {
  border-left-color: var(--pf-accent);
}

.pf-md-rendered li.task {
  list-style: none;
  margin-left: -1.25rem;
}

.pf-md-rendered .footnotes {
  margin-top: 1.5rem;
  font-size: .875rem;
  color: var(--pf-muted);
}

.pf-md-rendered mark {
  padding: 0 .15em;
  background: #fbe7a1;
  color: #3d2d00;
}

.pf-md-rendered .post-list,
.pf-md-rendered .tag-cloud {
  list-style: none;
  padding: 0;
}

.pf-md-rendered .link-blocked,
.pf-md-rendered .image-blocked {
  color: var(--pf-error-text);
  text-decoration: line-through;
}

.pf-md-rendered img {
  border-radius: var(--pf-radius);
}

.pf-md-table {
  font-size: .9375rem;
}

.pf-md-table code {
  white-space: nowrap;
}

/* --- pagine di errore ---------------------------------------------------- */

.pf-error {
  padding-top: 1.5rem;
}

.pf-error-code {
  margin: 0 0 .25rem;
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--pf-border-strong);
}

.pf-error-links {
  flex-direction: column;
  gap: .375rem;
}

/* --- piè di pagina ------------------------------------------------------- */

.pf-footer {
  flex: 0 0 auto;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--pf-border);
  background: var(--pf-surface);
  font-size: .875rem;
  color: var(--pf-muted);
}

.pf-footer-note {
  margin: .75rem 0 0;
  max-width: 44rem;
}

/* --- stampa e movimento -------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

@media print {
  .pf-header,
  .pf-footer,
  .pf-flash,
  .skip-link {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }
}